Cannot edit after switch back from another application

Question

I experienced a situation which is absolutely weird.

Many of my applications can suddenly refuse input from my keyboard, but if I click somewhere in the app, I re-type, it works ...

for example. I opened my netbeans to edit a php class. it works fine, I'm happy and I switch to my browser to see result. after I come back to netbeans, I found I cannot type anything, if and only if I click around (whatever in netbeans) , it will work.

So firstly I suppose it should be a netbeans bug. bu unfortunetely, some other applications has similiar issues, for example, mysql workbench, even I come across one to start edit this ticket... can be re-producted 100% after lose focus of netbeans

then I think it could be an ubuntu bug, other than netbeans, mysql workbench, chrome etc.

So, I'm totally lost. you konw it just annoying and unefficient to work with sth like this.

Already search around in google, still no luck.

my os : ubuntu desktop 12.04 and sth get from uname -a : 3.2.0-23-generic-pae #36-Ubuntu SMP Tue Apr 10 22:19:09 UTC 2012 i686 i686 i386 GNU/Linux I'm working on a laptop HP ProBook 4431s.

Thanks in advance for any idea.

Answer 1

I just think that it is a general bug for ubuntu, because i have kind of the same problem on my computer too. But it helps, (sometimes) to just re-login, and it will probably work better. Here, i just put it to sleep, and wake it up again, and it works better, but not always.

But, did you solve it?